Run the Alamo 26.2 Half Marathon

San Antonio, TX, USA · March 7, 2027·
partly-cloudy-day56°·57° high·Light·Dry
8
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Race Day Weather

partly-cloudy-day
56°at start
70° high
Breezy
Dry
Your goal
0:00:00

Comfortable temps, warming through the race

Mild 56°F temps at gun time mean comfortable early miles without overheating risk. Temperatures rising to 70°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing. Moderate humidity at 66% is worth noting for effort level, especially in later miles.

Race day forecast available in 113 days
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Race Plan

Get your personalized Run the Alamo 26.2 Half Marathon race plan

A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.

Race Pace
Weather Splits
Nutrition
Gear & Packing
T-Minus
Carb Tracker
Spectator Guide
Race Band

Race Info

The Alamo 13.1 starts and finishes at Civic Park at Hemisfair in downtown San Antonio on the Sunday of race weekend. The flat, fast course winds through downtown past cultural landmarks near The Alamo and historic Houston Street. The race begins with a live cannon blast and musket volley around sunrise.

Race weekend

Saturday, March 6
7:30 AM10K (6.2 mi)
7:45 AM5K (3.1 mi)
Sunday, March 7
6:45 AMMarathon (26.2 mi)
6:45 AMHalf Marathon (13.1 mi)

FAQ

When is the 2027 Run the Alamo 26.2 Half Marathon?

The 2027 Run the Alamo 26.2 Half Marathon will be held on Sunday March 7, 2027.

What is the time limit for the Run the Alamo 26.2 Half Marathon?

The time limit for the Run the Alamo 26.2 Half Marathon is 4 hours.

What will the weather be like for the 2027 Run the Alamo 26.2 Half Marathon?

The forecast calls for a high of 76°F and a low of 54°F with a 8% chance of rain. Check our detailed hourly forecast above for the best half marathon race plan.

Historical Weather

Based on 7 years of data
Avg Temp
59°F
L:58° H:61°
RunScore
7
Conditions
Rain Freq
0%
0 of 7 yrs
Wind5mph
Dew55°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
cloudy
69°/69°-
5
2025
partly-cloudy-night
61°/62°-
6
2024
cloudy
65°/66°-
5
2023
clear-night
49°/54°-
9
2022
cloudy
70°/70°-
4
2021
clear-night
45°/49°-
10
2020
cloudy
49°/54°-
9